package com.syc.rpc;

import com.syc.serializer.Serializer;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;

import java.util.List;

public class RpcDecoder extends ByteToMessageDecoder {
    private Class<?> clazz;

    private Serializer serializer;

    public RpcDecoder(Class<?> clazz, Serializer serializer) {
        this.clazz = clazz;
        this.serializer = serializer;

    }

    protected void decode(ChannelHandlerContext channelHandlerContext,
                          ByteBuf byteBuf, List<Object> list) throws Exception {
        if (clazz != null) {
            int dataLength  = byteBuf.readInt();
            byte[] body = new byte[dataLength];
            byteBuf.readBytes(body);
            Object deserialize = serializer.deserialize(clazz, body);
            list.add(deserialize);
        }
    }
}
